I have a 2006 dodge dakota manual trans. V6 3.7 L. i just found out its running off gear oil in transmission. It shows my kind of vehicle suppose to use ATF-4 AUTOMATIC transmission fliud. Should i be concerned about this. My transmussion makes noises when i go to change gears. Its like metal gears inside are rubbing as it goes to shift. It runs good when i first drive it. Then it starts acting up to where something is not catching as i shift. Need advise and help, thanks